Apparatus for making and sharpening rock-drills.



' v Patented Nam l3, I900. G. 'GLOSSOP. APPARATUS FOR MAKING ANDSHABPENING ROCK DRILLS.

(Application filed May 22, 1900.) v i (No Model.) a' Sheets-Sheet No.676L795.

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No. 66|,798. n Patented Nov. l3, I900;

m G. GLOSSOP.

APPARATUS FOR MAKING AND SHARPENING BUCK DRILLS.

(Application filed May 22, 1900.)

(No Model.)

3 Sheets-Shed 2.

No. 66|,798. Patented Nov. l3, I900.

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APPARATUS FOR MAKING AND SHARPENI NG BUCK DRI'LLS.

(Application filed May 22, 1900.)

3 Sheets-Sheet 3.

(No Model.)

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UNITED STATES IATENT OFFICE GILBERT GLOSSOP, OF LEEDS, ENGLAND.

APPARATUS FOR MAKING AND SHARPENING ROCK-DRILLS.

SPECIFICATION forming partof Letters Patent NO. 661,798, dated November13, 1900.

Application filed May 22, 1900.

To all whom it may concern Be it known that I, GILBERT GLossoP, asubject of the Queen of Great Britain and Ireland, residing at the cityof Leeds, England, have invented certain new and useful Improvements inMachinery or Apparatus for Making and Sharpening Rock-Boring Drills,(for which I have applied for Letters Patent in Great Britain andIreland, No. 17,702, hearing date September 1, 1899,) of which thefollowing is a specification.

The object of this invention is to provide machinery or apparatuswhereby the making and sharpening of rock-boring drills having three orfour chisel-pointed wings may be readily and accurately effected even byunskilled labor, and comprises a vertical and a horizontal steam orcompressed -air driven hammer with anvil-block and dies or tools fittedto the anvil block and to the heads of the horizontal and verticalhammers for, first, jumping orswelling up the endof the steel drill-bar,which is usually octagonal in section, by means of the horizontalhammer, so as to form a conical head containing sufficient metal to formthe wings; second, drawing and forming the conical head by means of thevertical hammer to a shape intermediate between the cone and thefinished wings; third, forming the wings to proper size and shape bymeans of the vertical hammer, and, fourth and lastly, sharpening thechisel-shaped ends of the wings by means of the horizontal hammer. Thefirst two operations are intended to be performed at one heat and thelast two operations at a second heat, these last two operations onlybeing required in the case of drills sent from the mine to beresharpened.

In the following description reference is bad to the accompanyingdrawings,of which- Figure 1 is a longitudinal section, and Fig. 2 an endelevation, with the cylinder in section, showing the general arrangementof the vertical and horizontal hammers and anvil,

omitting details which do not form part of the invention claimed. Figs.3 and 4 are perwinged rock-boring drill, respectively, as proposed to bemadeand sharpened by the machinery or apparatus herein described. Fig. 5is a longitudinal vertical section online A A B B of Fig. 7. Fig. 6 isan elevation on Serial No. 17,582. (No model.)

line C O of Fig. 5, and Fig. 7 is a plan showing the dies or tools inposition on the hammer-heads and anvil for jumping up the steel bar toform a conical head and afterward forming the conical head to theintermediate shape for a three-winged rock-drill. Fig. 8 is aperspective View of the die or tool for drawing and forming the conicalhead to the intermediate shape for a four-winged rockdrill. Fig. 9 is alongitudinal vertical section on line-D D of Fig. 11; Fig. 10, avertical section on line E E F F of Fig. 9, and Fig. 11 is a plan of thedies or tools in position on the hammer-heads and anvil for forming thewings to the finished shape and forsharpening the chisel ends andincludes, also, means for assisting in holding the bar securely whilethese operations are being performed. v Fig. 12 is a front view of thesharpening die or tool for a three-Winged drill, and Fig. 13 of thesharpening tool or die for a four-winged drill. Fig. 14 is a frontelevation of the forming dies or tools and of the holding dies or toolsfor a four-winged rock-drill.

In all the figures the same reference-letter refers to the same orcorresponding part.

G indicates the piston-rod of the vertical hammer, and H that of thehorizontal hammer, while I indicates the side standards of the verticalhammer.

K is the main anvil-block, formed with a dovetailed groove to receivethe die or tool blocks L and M, which contain the dies or tools forperforming the above-mentioned operations.

N is the head of the vertical hammer, likewise provided with adovetailed groove to receive the die or tool block 0, while P is thehead of the horizontal hammer, also provided with a dovetailed groove toreceive the die or tool block Q.

R, Figs. 5, 6, and 7, is the anvil die or tool for forming the conicalhead and is made in two halves, which fit in a groove in the tooltheposition-of the steel bar in the tool or die B, so as to leave thenecessary length pro-.

jecting to provide sufficient metal to form the conical head. By using athinner or thicker U-shaped sleeve Y and adjusting the position of thelever V on the rod U by means of the set-screw the amount by which theend of the steel bar is made to project through the die R can beadjusted as required.

a is the lower and b the upper die forformingtheconetotheintermediateshape. These are fitted, respectively, inthe die-blocks L and O, the former in a rectangular and the latter in adovetailed groove.

0 is the bottom and d is the top tool or die for forming the wings onthe end of the steel bar to the proper shape and are fitted, respectively, in the die or tool blocks M and 0. They are both provided with arectangular slot at the front end to receive the beveled steel plates eand f, respectively, which serve to form the chisel-shaped ends of thewings.

The steel plate 6 may be formed in twohalves,

move apart and as they are pushed back they come together, in thislatter case gripping the drill-bar tightly between them. The dies aremoved forward and backward from the footleverp by means of the lugs q,shaft 0", and rocking levers s.

The apparatus is used as follows: The heated end of the drill-bar ispushed through the cone-forming die or tool R, Figs. 5 to 7, against thestop-lever T, which is momentarily raised to fix the position of thedrill-bar with the proper length projecting. The stoplever T is thendropped and the horizontal hammer started and kept-working until theupsetting die or tool S has caused the metal to fill the cone hollow ofthe die or tool R. The'hammer-head P is then drawn back and the twohalves of the die or tool R pushed forward until they gape suflicientlyto allow the drill-bar to be lifted out, when the drill-bar isimmediately placed with the cone-head over the front partof theadjoining tool or die a. The vertical hammer is then set to work andkept working until the cone end is drawn and formed by the dies or toolsa. and b to the intermediate shape. This operation is repeated with'asmany drill-bars as are required. In the case of four-winged rock-drillsbeing required the die or tool illustrated in Fig. 8 is substituted forthedie a with a similar top die or tool. The die or tool block L is thenreplaced by the die or tool block M,

or die 0 to move horizontally under the torming operation. The top toolor die dis dove; tailed in the die or tool block 0.

h and 'i are holding tools or dies fitted, respectively, in thedie-blocks M and O and serve to hold the drill with the chisel endsprojecting, so as to be acted upon by the sharpening-tool 0 forthree-winged drills and Z for four-winged drills, which fit by means ofa conical stem min a conical socket in the-head P of the horizontalhammer.

The two wing-spaces left by the juxtaposid are narrower at the root orcenter than at the outside, so that the finished drill leaves acomparatively large space for the passage of debris from the end of thedrill-hole during the drilling operation in the mine. As the lower winghas to be moved vertically when the drill is inserted or removed fromthe tool or die a, the lower vertical wing-groove is made the same widthfrom top to bottom, and

during the forming operation the drill-bar is several times'rotatedthrough one hundred and twenty degrees to insure that all the threewings are made thinner near the root or center than at the outside. Thisapplies also to the holding die or tool h.

To assist in holding the drill during the last two operations, thegripping device shown in Figs. 9 and 11 is employed and bolted to theanvil-bed behind the anvil-block K. The device consists of a pair ofsplit gripping-dies n, fitted in the tapered slides formed in thecasting 0, so that as they are drawn outthey Figs. 9 to 11', fitted withthe dies or tools 0 and h. The die or tool I), Fig. 6, is removed fromthe die or tool block 0, and the dies or tools d and z, Fig. 10, areattached thereto. The die or tool block Q is removed from the horizontalhammer-head P, and the sharpening die or tool is, Figs. 11 and 12, isthen fitted in the socket-hole m in the hammer-head P. The drill-barsfrom the last of the above-described operations or the blunted drillsfrom the mine are heated, and the heated end of each drill-bar is firstplaced resting on the die or tool 0 and the'vertical hammer then startedworking, during which the drill-bar is occasionally rotated through onehundred and twenty degrees, as otherwise the bottom wing on the drillinstead of being narrower nearerthe center would be of the same widththroughout. The solid parts of the dieor tool cand 01 form the bodies ofthe wings, while the .beveled plates eand f point or form the chiseldown with the holding-die z' on the top of the wings toassist in holdingthe drill, while the horizontal hamner is set to work and the sharpeningtool ordie 7r, brings the chisel ends up to the proper degree ofsharpness. The pointing or shaping: of the chisel-ends under theVertical hammer and the sharpening by IIO the horizontal hammersubsequently and at a consequentlycomparatively lower temperatureovercome the difficulty often experienced when the chisel ends areformed or pointed in the first instance by a percussive action in thedirection of the length of the drill, in that in the latter case theWings are usually jumped up or thickened instead of the metal beingdrawn out to a chisel-point.

In the case of four-winged drills the forming dies or tools 0 and d andthe holding dies or tools It and 'i are replaced by others. (Shown infront elevation in Fig. 14:.)

Having now described my invention, What I claim as new, and desire tosecure by Letters Patent, is

1. The combination of an anvil-block and vertical and horizontal diesfitted into the same with a vertically-acting die-carrying hammer and ahorizontally-acting die-carryin g hammer, the said hammers being adaptedto be used either for drill-forming or'drillsharpening and the dies ofthe said anvil being interchangeable to allow its use for either of thesaid purposes, substantially as set forth.

2. In machinery or apparatus for mending and sharpening blunted and Wornrock-drills the combination of a vertical and a horizontal hammer and ananvil, the hammer-head n of the vertical hammer having a wing drawing,forming and pointing die or tool d and a holding-die t', the hammer-headp of the horizontal hammer having a wing-sharpening tool or die It,while the anvil-block is provided With a wing pointing, forming anddrawing die 0 and a holding-die 71, all substantially as herein setforth.

3. In machinery or apparatus for mending and sharpening blunted and wornrock-drills the combination of a vertical hammer, a horizontal hammer,an anvil, the hammer-head N of the vertical hammer havinga wing draw ingand pointing die or tool at and a holdingdie t', the hammer-head p ofthe horizontal hammer having a wing-sharpening tool or die 70, and theanvil-blockbeing provided with a wing pointing, forming and drawing die0 and a holding-die h, and of the double gripping device consisting oftwo hollow split taper gripping-blocks n, tapered guides or slidesconnecting lugs q, rocking levers s, shaft 0* and foot-lever 19 allsubstantially as herein set forth.

4c. In machinery for making and sharpening rock-drills the combinationon one anvilblock of a bottom wing forming and'pointing die 0 and awing-holding die h, a horizontallyacting die and upper,vertically-acting dies adapted to cooperate with the dies on said anvil,substantially as herein set forth.

5. In wing forming and pointing dies or tools for making and sharpeningrock-drills the combination of block-dies c and (I having recesses toform the wings of beveled drawing and pointing steel plates 6 andffitted in recesses formed toward the front of the blocks to receive it,substantially as herein set forth.

GILBERT GLOSSOP.

Witnesses:

J. C ARK JEFFERSON, .INo. A. TINKER.

